Water heater



FIG. 1 is a perspective view of a water heater showing our new design;

FIG. 2 is a top plan view of the water heater shown in FIG. 1, with the top element shown broken away to disclose the top of the claimed portion thereof;

FIG. 3 is a side elevation view of the water heater shown in FIG. 1; and,

FIG. 4 is a front elevation view of the water heater shown in FIG. 1.

The present application is directed to the shape and contour of the design illustrated in the drawings. The broken line showing of the environment is for illustrative purposes only and forms on part of the claimed design.

In the drawings, the vertical cut away shown in FIGS. 1, 3 and 4 indicates no specific height 

We claim the ornamental design for a water heater, as shown and described in the figures. 